1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2016 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_format.h" 9 #include "xfs_log_format.h" 10 #include "xfs_trans_resv.h" 11 #include "xfs_bit.h" 12 #include "xfs_shared.h" 13 #include "xfs_mount.h" 14 #include "xfs_defer.h" 15 #include "xfs_inode.h" 16 #include "xfs_trans.h" 17 #include "xfs_trans_priv.h" 18 #include "xfs_bmap_item.h" 19 #include "xfs_log.h" 20 #include "xfs_bmap.h" 21 #include "xfs_icache.h" 22 #include "xfs_bmap_btree.h" 23 #include "xfs_trans_space.h" 24 #include "xfs_error.h" 25 #include "xfs_log_priv.h" 26 #include "xfs_log_recover.h" 27 28 kmem_zone_t *xfs_bui_zone; 29 kmem_zone_t *xfs_bud_zone; 30 31 static const struct xfs_item_ops xfs_bui_item_ops; 32 33 static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip) 34 { 35 return container_of(lip, struct xfs_bui_log_item, bui_item); 36 } 37 38 STATIC void 39 xfs_bui_item_free( 40 struct xfs_bui_log_item *buip) 41 { 42 kmem_cache_free(xfs_bui_zone, buip); 43 } 44 45 /* 46 * Freeing the BUI requires that we remove it from the AIL if it has already 47 * been placed there. However, the BUI may not yet have been placed in the AIL 48 * when called by xfs_bui_release() from BUD processing due to the ordering of 49 * committed vs unpin operations in bulk insert operations. Hence the reference 50 * count to ensure only the last caller frees the BUI. 51 */ 52 STATIC void 53 xfs_bui_release( 54 struct xfs_bui_log_item *buip) 55 { 56 ASSERT(atomic_read(&buip->bui_refcount) > 0); 57 if (atomic_dec_and_test(&buip->bui_refcount)) { 58 xfs_trans_ail_delete(&buip->bui_item, SHUTDOWN_LOG_IO_ERROR); 59 xfs_bui_item_free(buip); 60 } 61 } 62 63 64 STATIC void 65 xfs_bui_item_size( 66 struct xfs_log_item *lip, 67 int *nvecs, 68 int *nbytes) 69 { 70 struct xfs_bui_log_item *buip = BUI_ITEM(lip); 71 72 *nvecs += 1; 73 *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents); 74 } 75 76 /* 77 * This is called to fill in the vector of log iovecs for the 78 * given bui log item. We use only 1 iovec, and we point that 79 * at the bui_log_format structure embedded in the bui item. 80 * It is at this point that we assert that all of the extent 81 * slots in the bui item have been filled. 82 */ 83 STATIC void 84 xfs_bui_item_format( 85 struct xfs_log_item *lip, 86 struct xfs_log_vec *lv) 87 { 88 struct xfs_bui_log_item *buip = BUI_ITEM(lip); 89 struct xfs_log_iovec *vecp = NULL; 90 91 ASSERT(atomic_read(&buip->bui_next_extent) == 92 buip->bui_format.bui_nextents); 93 94 buip->bui_format.bui_type = XFS_LI_BUI; 95 buip->bui_format.bui_size = 1; 96 97 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format, 98 xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents)); 99 } 100 101 /* 102 * The unpin operation is the last place an BUI is manipulated in the log. It is 103 * either inserted in the AIL or aborted in the event of a log I/O error. In 104 * either case, the BUI transaction has been successfully committed to make it 105 * this far. Therefore, we expect whoever committed the BUI to either construct 106 * and commit the BUD or drop the BUD's reference in the event of error. Simply 107 * drop the log's BUI reference now that the log is done with it. 108 */ 109 STATIC void 110 xfs_bui_item_unpin( 111 struct xfs_log_item *lip, 112 int remove) 113 { 114 struct xfs_bui_log_item *buip = BUI_ITEM(lip); 115 116 xfs_bui_release(buip); 117 } 118 119 /* 120 * The BUI has been either committed or aborted if the transaction has been 121 * cancelled. If the transaction was cancelled, an BUD isn't going to be 122 * constructed and thus we free the BUI here directly. 123 */ 124 STATIC void 125 xfs_bui_item_release( 126 struct xfs_log_item *lip) 127 { 128 xfs_bui_release(BUI_ITEM(lip)); 129 } 130 131 /* 132 * Allocate and initialize an bui item with the given number of extents. 133 */ 134 STATIC struct xfs_bui_log_item * 135 xfs_bui_init( 136 struct xfs_mount *mp) 137 138 { 139 struct xfs_bui_log_item *buip; 140 141 buip = kmem_cache_zalloc(xfs_bui_zone, GFP_KERNEL | __GFP_NOFAIL); 142 143 xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops); 144 buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS; 145 buip->bui_format.bui_id = (uintptr_t)(void *)buip; 146 atomic_set(&buip->bui_next_extent, 0); 147 atomic_set(&buip->bui_refcount, 2); 148 149 return buip; 150 } 151 152 static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip) 153 { 154 return container_of(lip, struct xfs_bud_log_item, bud_item); 155 } 156 157 STATIC void 158 xfs_bud_item_size( 159 struct xfs_log_item *lip, 160 int *nvecs, 161 int *nbytes) 162 { 163 *nvecs += 1; 164 *nbytes += sizeof(struct xfs_bud_log_format); 165 } 166 167 /* 168 * This is called to fill in the vector of log iovecs for the 169 * given bud log item. We use only 1 iovec, and we point that 170 * at the bud_log_format structure embedded in the bud item. 171 * It is at this point that we assert that all of the extent 172 * slots in the bud item have been filled. 173 */ 174 STATIC void 175 xfs_bud_item_format( 176 struct xfs_log_item *lip, 177 struct xfs_log_vec *lv) 178 { 179 struct xfs_bud_log_item *budp = BUD_ITEM(lip); 180 struct xfs_log_iovec *vecp = NULL; 181 182 budp->bud_format.bud_type = XFS_LI_BUD; 183 budp->bud_format.bud_size = 1; 184 185 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format, 186 sizeof(struct xfs_bud_log_format)); 187 } 188 189 /* 190 * The BUD is either committed or aborted if the transaction is cancelled. If 191 * the transaction is cancelled, drop our reference to the BUI and free the 192 * BUD. 193 */ 194 STATIC void 195 xfs_bud_item_release( 196 struct xfs_log_item *lip) 197 { 198 struct xfs_bud_log_item *budp = BUD_ITEM(lip); 199 200 xfs_bui_release(budp->bud_buip); 201 kmem_cache_free(xfs_bud_zone, budp); 202 } 203 204 static const struct xfs_item_ops xfs_bud_item_ops = { 205 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED, 206 .iop_size = xfs_bud_item_size, 207 .iop_format = xfs_bud_item_format, 208 .iop_release = xfs_bud_item_release, 209 }; 210 211 static struct xfs_bud_log_item * 212 xfs_trans_get_bud( 213 struct xfs_trans *tp, 214 struct xfs_bui_log_item *buip) 215 { 216 struct xfs_bud_log_item *budp; 217 218 budp = kmem_cache_zalloc(xfs_bud_zone, GFP_KERNEL | __GFP_NOFAIL); 219 xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD, 220 &xfs_bud_item_ops); 221 budp->bud_buip = buip; 222 budp->bud_format.bud_bui_id = buip->bui_format.bui_id; 223 224 xfs_trans_add_item(tp, &budp->bud_item); 225 return budp; 226 } 227 228 /* 229 * Finish an bmap update and log it to the BUD. Note that the 230 * transaction is marked dirty regardless of whether the bmap update 231 * succeeds or fails to support the BUI/BUD lifecycle rules. 232 */ 233 static int 234 xfs_trans_log_finish_bmap_update( 235 struct xfs_trans *tp, 236 struct xfs_bud_log_item *budp, 237 enum xfs_bmap_intent_type type, 238 struct xfs_inode *ip, 239 int whichfork, 240 xfs_fileoff_t startoff, 241 xfs_fsblock_t startblock, 242 xfs_filblks_t *blockcount, 243 xfs_exntst_t state) 244 { 245 int error; 246 247 error = xfs_bmap_finish_one(tp, ip, type, whichfork, startoff, 248 startblock, blockcount, state); 249 250 /* 251 * Mark the transaction dirty, even on error. This ensures the 252 * transaction is aborted, which: 253 * 254 * 1.) releases the BUI and frees the BUD 255 * 2.) shuts down the filesystem 256 */ 257 tp->t_flags |= XFS_TRANS_DIRTY; 258 set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags); 259 260 return error; 261 } 262 263 /* Sort bmap intents by inode. */ 264 static int 265 xfs_bmap_update_diff_items( 266 void *priv, 267 const struct list_head *a, 268 const struct list_head *b) 269 { 270 struct xfs_bmap_intent *ba; 271 struct xfs_bmap_intent *bb; 272 273 ba = container_of(a, struct xfs_bmap_intent, bi_list); 274 bb = container_of(b, struct xfs_bmap_intent, bi_list); 275 return ba->bi_owner->i_ino - bb->bi_owner->i_ino; 276 } 277 278 /* Set the map extent flags for this mapping. */ 279 static void 280 xfs_trans_set_bmap_flags( 281 struct xfs_map_extent *bmap, 282 enum xfs_bmap_intent_type type, 283 int whichfork, 284 xfs_exntst_t state) 285 { 286 bmap->me_flags = 0; 287 switch (type) { 288 case XFS_BMAP_MAP: 289 case XFS_BMAP_UNMAP: 290 bmap->me_flags = type; 291 break; 292 default: 293 ASSERT(0); 294 } 295 if (state == XFS_EXT_UNWRITTEN) 296 bmap->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN; 297 if (whichfork == XFS_ATTR_FORK) 298 bmap->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK; 299 } 300 301 /* Log bmap updates in the intent item. */ 302 STATIC void 303 xfs_bmap_update_log_item( 304 struct xfs_trans *tp, 305 struct xfs_bui_log_item *buip, 306 struct xfs_bmap_intent *bmap) 307 { 308 uint next_extent; 309 struct xfs_map_extent *map; 310 311 tp->t_flags |= XFS_TRANS_DIRTY; 312 set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags); 313 314 /* 315 * atomic_inc_return gives us the value after the increment; 316 * we want to use it as an array index so we need to subtract 1 from 317 * it. 318 */ 319 next_extent = atomic_inc_return(&buip->bui_next_extent) - 1; 320 ASSERT(next_extent < buip->bui_format.bui_nextents); 321 map = &buip->bui_format.bui_extents[next_extent]; 322 map->me_owner = bmap->bi_owner->i_ino; 323 map->me_startblock = bmap->bi_bmap.br_startblock; 324 map->me_startoff = bmap->bi_bmap.br_startoff; 325 map->me_len = bmap->bi_bmap.br_blockcount; 326 xfs_trans_set_bmap_flags(map, bmap->bi_type, bmap->bi_whichfork, 327 bmap->bi_bmap.br_state); 328 } 329 330 static struct xfs_log_item * 331 xfs_bmap_update_create_intent( 332 struct xfs_trans *tp, 333 struct list_head *items, 334 unsigned int count, 335 bool sort) 336 { 337 struct xfs_mount *mp = tp->t_mountp; 338 struct xfs_bui_log_item *buip = xfs_bui_init(mp); 339 struct xfs_bmap_intent *bmap; 340 341 ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS); 342 343 xfs_trans_add_item(tp, &buip->bui_item); 344 if (sort) 345 list_sort(mp, items, xfs_bmap_update_diff_items); 346 list_for_each_entry(bmap, items, bi_list) 347 xfs_bmap_update_log_item(tp, buip, bmap); 348 return &buip->bui_item; 349 } 350 351 /* Get an BUD so we can process all the deferred rmap updates. */ 352 static struct xfs_log_item * 353 xfs_bmap_update_create_done( 354 struct xfs_trans *tp, 355 struct xfs_log_item *intent, 356 unsigned int count) 357 { 358 return &xfs_trans_get_bud(tp, BUI_ITEM(intent))->bud_item; 359 } 360 361 /* Process a deferred rmap update. */ 362 STATIC int 363 xfs_bmap_update_finish_item( 364 struct xfs_trans *tp, 365 struct xfs_log_item *done, 366 struct list_head *item, 367 struct xfs_btree_cur **state) 368 { 369 struct xfs_bmap_intent *bmap; 370 xfs_filblks_t count; 371 int error; 372 373 bmap = container_of(item, struct xfs_bmap_intent, bi_list); 374 count = bmap->bi_bmap.br_blockcount; 375 error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done), 376 bmap->bi_type, 377 bmap->bi_owner, bmap->bi_whichfork, 378 bmap->bi_bmap.br_startoff, 379 bmap->bi_bmap.br_startblock, 380 &count, 381 bmap->bi_bmap.br_state); 382 if (!error && count > 0) { 383 ASSERT(bmap->bi_type == XFS_BMAP_UNMAP); 384 bmap->bi_bmap.br_blockcount = count; 385 return -EAGAIN; 386 } 387 kmem_free(bmap); 388 return error; 389 } 390 391 /* Abort all pending BUIs. */ 392 STATIC void 393 xfs_bmap_update_abort_intent( 394 struct xfs_log_item *intent) 395 { 396 xfs_bui_release(BUI_ITEM(intent)); 397 } 398 399 /* Cancel a deferred rmap update. */ 400 STATIC void 401 xfs_bmap_update_cancel_item( 402 struct list_head *item) 403 { 404 struct xfs_bmap_intent *bmap; 405 406 bmap = container_of(item, struct xfs_bmap_intent, bi_list); 407 kmem_free(bmap); 408 } 409 410 const struct xfs_defer_op_type xfs_bmap_update_defer_type = { 411 .max_items = XFS_BUI_MAX_FAST_EXTENTS, 412 .create_intent = xfs_bmap_update_create_intent, 413 .abort_intent = xfs_bmap_update_abort_intent, 414 .create_done = xfs_bmap_update_create_done, 415 .finish_item = xfs_bmap_update_finish_item, 416 .cancel_item = xfs_bmap_update_cancel_item, 417 }; 418 419 /* Is this recovered BUI ok? */ 420 static inline bool 421 xfs_bui_validate( 422 struct xfs_mount *mp, 423 struct xfs_bui_log_item *buip) 424 { 425 struct xfs_map_extent *bmap; 426 427 /* Only one mapping operation per BUI... */ 428 if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) 429 return false; 430 431 bmap = &buip->bui_format.bui_extents[0]; 432 433 if (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS) 434 return false; 435 436 switch (bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) { 437 case XFS_BMAP_MAP: 438 case XFS_BMAP_UNMAP: 439 break; 440 default: 441 return false; 442 } 443 444 if (!xfs_verify_ino(mp, bmap->me_owner)) 445 return false; 446 447 if (!xfs_verify_fileext(mp, bmap->me_startoff, bmap->me_len)) 448 return false; 449 450 return xfs_verify_fsbext(mp, bmap->me_startblock, bmap->me_len); 451 } 452 453 /* 454 * Process a bmap update intent item that was recovered from the log. 455 * We need to update some inode's bmbt. 456 */ 457 STATIC int 458 xfs_bui_item_recover( 459 struct xfs_log_item *lip, 460 struct list_head *capture_list) 461 { 462 struct xfs_bmbt_irec irec; 463 struct xfs_bui_log_item *buip = BUI_ITEM(lip); 464 struct xfs_trans *tp; 465 struct xfs_inode *ip = NULL; 466 struct xfs_mount *mp = lip->li_mountp; 467 struct xfs_map_extent *bmap; 468 struct xfs_bud_log_item *budp; 469 xfs_filblks_t count; 470 xfs_exntst_t state; 471 unsigned int bui_type; 472 int whichfork; 473 int iext_delta; 474 int error = 0; 475 476 if (!xfs_bui_validate(mp, buip)) { 477 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, 478 &buip->bui_format, sizeof(buip->bui_format)); 479 return -EFSCORRUPTED; 480 } 481 482 bmap = &buip->bui_format.bui_extents[0]; 483 state = (bmap->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ? 484 XFS_EXT_UNWRITTEN : XFS_EXT_NORM; 485 whichfork = (bmap->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ? 486 XFS_ATTR_FORK : XFS_DATA_FORK; 487 bui_type = bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK; 488 489 error = xlog_recover_iget(mp, bmap->me_owner, &ip); 490 if (error) 491 return error; 492 493 /* Allocate transaction and do the work. */ 494 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 495 XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp); 496 if (error) 497 goto err_rele; 498 499 budp = xfs_trans_get_bud(tp, buip); 500 xfs_ilock(ip, XFS_ILOCK_EXCL); 501 xfs_trans_ijoin(tp, ip, 0); 502 503 if (bui_type == XFS_BMAP_MAP) 504 iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT; 505 else 506 iext_delta = XFS_IEXT_PUNCH_HOLE_CNT; 507 508 error = xfs_iext_count_may_overflow(ip, whichfork, iext_delta); 509 if (error) 510 goto err_cancel; 511 512 count = bmap->me_len; 513 error = xfs_trans_log_finish_bmap_update(tp, budp, bui_type, ip, 514 whichfork, bmap->me_startoff, bmap->me_startblock, 515 &count, state); 516 if (error == -EFSCORRUPTED) 517 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bmap, 518 sizeof(*bmap)); 519 if (error) 520 goto err_cancel; 521 522 if (count > 0) { 523 ASSERT(bui_type == XFS_BMAP_UNMAP); 524 irec.br_startblock = bmap->me_startblock; 525 irec.br_blockcount = count; 526 irec.br_startoff = bmap->me_startoff; 527 irec.br_state = state; 528 xfs_bmap_unmap_extent(tp, ip, &irec); 529 } 530 531 /* 532 * Commit transaction, which frees the transaction and saves the inode 533 * for later replay activities. 534 */ 535 error = xfs_defer_ops_capture_and_commit(tp, ip, capture_list); 536 if (error) 537 goto err_unlock; 538 539 xfs_iunlock(ip, XFS_ILOCK_EXCL); 540 xfs_irele(ip); 541 return 0; 542 543 err_cancel: 544 xfs_trans_cancel(tp); 545 err_unlock: 546 xfs_iunlock(ip, XFS_ILOCK_EXCL); 547 err_rele: 548 xfs_irele(ip); 549 return error; 550 } 551 552 STATIC bool 553 xfs_bui_item_match( 554 struct xfs_log_item *lip, 555 uint64_t intent_id) 556 { 557 return BUI_ITEM(lip)->bui_format.bui_id == intent_id; 558 } 559 560 /* Relog an intent item to push the log tail forward. */ 561 static struct xfs_log_item * 562 xfs_bui_item_relog( 563 struct xfs_log_item *intent, 564 struct xfs_trans *tp) 565 { 566 struct xfs_bud_log_item *budp; 567 struct xfs_bui_log_item *buip; 568 struct xfs_map_extent *extp; 569 unsigned int count; 570 571 count = BUI_ITEM(intent)->bui_format.bui_nextents; 572 extp = BUI_ITEM(intent)->bui_format.bui_extents; 573 574 tp->t_flags |= XFS_TRANS_DIRTY; 575 budp = xfs_trans_get_bud(tp, BUI_ITEM(intent)); 576 set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags); 577 578 buip = xfs_bui_init(tp->t_mountp); 579 memcpy(buip->bui_format.bui_extents, extp, count * sizeof(*extp)); 580 atomic_set(&buip->bui_next_extent, count); 581 xfs_trans_add_item(tp, &buip->bui_item); 582 set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags); 583 return &buip->bui_item; 584 } 585 586 static const struct xfs_item_ops xfs_bui_item_ops = { 587 .iop_size = xfs_bui_item_size, 588 .iop_format = xfs_bui_item_format, 589 .iop_unpin = xfs_bui_item_unpin, 590 .iop_release = xfs_bui_item_release, 591 .iop_recover = xfs_bui_item_recover, 592 .iop_match = xfs_bui_item_match, 593 .iop_relog = xfs_bui_item_relog, 594 }; 595 596 /* 597 * Copy an BUI format buffer from the given buf, and into the destination 598 * BUI format structure. The BUI/BUD items were designed not to need any 599 * special alignment handling. 600 */ 601 static int 602 xfs_bui_copy_format( 603 struct xfs_log_iovec *buf, 604 struct xfs_bui_log_format *dst_bui_fmt) 605 { 606 struct xfs_bui_log_format *src_bui_fmt; 607 uint len; 608 609 src_bui_fmt = buf->i_addr; 610 len = xfs_bui_log_format_sizeof(src_bui_fmt->bui_nextents); 611 612 if (buf->i_len == len) { 613 memcpy(dst_bui_fmt, src_bui_fmt, len); 614 return 0; 615 } 616 XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL); 617 return -EFSCORRUPTED; 618 } 619 620 /* 621 * This routine is called to create an in-core extent bmap update 622 * item from the bui format structure which was logged on disk. 623 * It allocates an in-core bui, copies the extents from the format 624 * structure into it, and adds the bui to the AIL with the given 625 * LSN. 626 */ 627 STATIC int 628 xlog_recover_bui_commit_pass2( 629 struct xlog *log, 630 struct list_head *buffer_list, 631 struct xlog_recover_item *item, 632 xfs_lsn_t lsn) 633 { 634 int error; 635 struct xfs_mount *mp = log->l_mp; 636 struct xfs_bui_log_item *buip; 637 struct xfs_bui_log_format *bui_formatp; 638 639 bui_formatp = item->ri_buf[0].i_addr; 640 641 if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) { 642 XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp); 643 return -EFSCORRUPTED; 644 } 645 buip = xfs_bui_init(mp); 646 error = xfs_bui_copy_format(&item->ri_buf[0], &buip->bui_format); 647 if (error) { 648 xfs_bui_item_free(buip); 649 return error; 650 } 651 atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents); 652 /* 653 * Insert the intent into the AIL directly and drop one reference so 654 * that finishing or canceling the work will drop the other. 655 */ 656 xfs_trans_ail_insert(log->l_ailp, &buip->bui_item, lsn); 657 xfs_bui_release(buip); 658 return 0; 659 } 660 661 const struct xlog_recover_item_ops xlog_bui_item_ops = { 662 .item_type = XFS_LI_BUI, 663 .commit_pass2 = xlog_recover_bui_commit_pass2, 664 }; 665 666 /* 667 * This routine is called when an BUD format structure is found in a committed 668 * transaction in the log. Its purpose is to cancel the corresponding BUI if it 669 * was still in the log. To do this it searches the AIL for the BUI with an id 670 * equal to that in the BUD format structure. If we find it we drop the BUD 671 * reference, which removes the BUI from the AIL and frees it. 672 */ 673 STATIC int 674 xlog_recover_bud_commit_pass2( 675 struct xlog *log, 676 struct list_head *buffer_list, 677 struct xlog_recover_item *item, 678 xfs_lsn_t lsn) 679 { 680 struct xfs_bud_log_format *bud_formatp; 681 682 bud_formatp = item->ri_buf[0].i_addr; 683 if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) { 684 XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp); 685 return -EFSCORRUPTED; 686 } 687 688 xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id); 689 return 0; 690 } 691 692 const struct xlog_recover_item_ops xlog_bud_item_ops = { 693 .item_type = XFS_LI_BUD, 694 .commit_pass2 = xlog_recover_bud_commit_pass2, 695 }; 696